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A chiari network mimicking a cystic structure.
J Walpot1, G Sahin-Arpaci, M Sadreddini
1Department of Cardiology, Admiraal De Ruyter Hospital, Goes & Vlissingen, Koudekerkseweg 88, PO Box 3200, 4380, DD, Vlissingen, the Netherlands, j.walpot@adrz.nl.
Summary
The Chiari network, a rare atrial structure, typically causes no issues. This case highlights an unusual Chiari network presentation mimicking a cardiac mass.
Area of Science:
- Cardiology
- Cardiac Anatomy
- Medical Imaging
Background:
- The Chiari network is a mobile, fenestrated structure near the inferior vena cava in the right atrium.
- It is typically an incidental finding with no clinical significance due to its non-obstructive nature.
Purpose of the Study:
- To report a rare case of Chiari network presenting atypically.
- To differentiate this unusual presentation from actual cardiac masses.
Main Methods:
- Case report of a patient with an unusual cardiac finding.
- Echocardiography and potentially other imaging modalities were used for diagnosis.
Main Results:
- An unusual Chiari network was identified, appearing as an oscillating cystic mass.
- The structure was attached to the interatrial septum by a thin stalk.
Conclusions:
- The Chiari network can present in ways that mimic serious cardiac pathology.
- Awareness of atypical Chiari network presentations is crucial for accurate diagnosis and avoiding unnecessary interventions.

